PhenoMenal
Well-Known Member
Anyone have any thoughts on the spectrum that's output by the Samsung LM561C's white light LEDs used on quantum boards?
They have 2700k, 3000k, 3500k, 4000k, 5000k, 5700k, and 6500k, and output an impressive 200 lumens/watt - i think only Samsung's LM301B's which were announced mid-2017 beat them in that regard at 220 lumens/watt [Samsung news link].
The theoretical max for "a white LED with phosphorescence color mixing" is 260–300 lumens/watt [physorg src]. Fascinating tech race to a finish-line established by physics
Quite stunning efficiency when compared to other well-known lights [img src]:
ps. ^ Good thing incandescent lightbulbs are being banned/phased out in many countries.
Anyway here's the 3000k and 6500k from the [LM561C datasheet]:
There's also very little infra-red above 700, so not much in the way of heat, and because they're outputting so many lumens per watt there isn't much being wasted as heat either, which i guess explains why most are just passively (and silently) cooled with heatsinks instead of active noisy fans, i'm guessing bedroom growers will no doubt appreciate the extra quietness
They have 2700k, 3000k, 3500k, 4000k, 5000k, 5700k, and 6500k, and output an impressive 200 lumens/watt - i think only Samsung's LM301B's which were announced mid-2017 beat them in that regard at 220 lumens/watt [Samsung news link].
The theoretical max for "a white LED with phosphorescence color mixing" is 260–300 lumens/watt [physorg src]. Fascinating tech race to a finish-line established by physics
Quite stunning efficiency when compared to other well-known lights [img src]:
ps. ^ Good thing incandescent lightbulbs are being banned/phased out in many countries.
Anyway here's the 3000k and 6500k from the [LM561C datasheet]:
There's also very little infra-red above 700, so not much in the way of heat, and because they're outputting so many lumens per watt there isn't much being wasted as heat either, which i guess explains why most are just passively (and silently) cooled with heatsinks instead of active noisy fans, i'm guessing bedroom growers will no doubt appreciate the extra quietness
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